Remote controlling apparatus



1937- H. A. WALLACE 2,090,716

REMOTE CONTROLLING APPARATUS Filed March 10, 1928 6 Sheets-Sheet 1 M21. mm

Aug. 24, 1937. H. A. WALLACE 2,090,716

REMOTE CONTROLLING APPARATUS Filed March 10, 1928 6 Sheets-Sheet 2 i: HAM e115,

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Au .24,1937. J H. A. WALLACE 2,090,716

REMOTE CONTROLL ING APPARATUS Filed March 10, 1928 a Sheets-Shet 3 Aug. 24, 1937. H.. A. WALLACE 2,090,716 REMOTE CONTROLLING APPARATUS Filed March 10, 1928 6 Sheets-Sheet 4 11937- H. A; WALLACE 2,090,716

REMOTE CONTROLL I NG- APPARATUS Filed March 10, 1928 6 Sheets-Sheet 6 205- I g x o-- 176 t 4 Y L 209 Fig. 6.

INVENTOR I Patented Aug. 24, 1937 LFNH'EQ g'lATES PATENT GFFHQE REMOTE CONTRULLING APPARATUS Application March 10, 1928, Serial No. 260,619

2'? Claims.

My invention relates to remote controlling apparatus, that is, to apparatus for selectively controlling a plurality of devices located at a distance from the control point. My invention is particularly suitable for, though in no way lim ited to, the control of traific governing devices, such as railway switches and signals.

The apparatus of the present invention is an improvement upon that disclosed in my copending application, Serial No. 125,659, filed July 29, 1926, for Railway trafiic controlling apparatus.

I will describe several forms of apparatus embodying my invention, and will then point out the novel features thereof in claims.

In the accompanying drawings, Figs. 1a and 1b, when placed end to end with Fig. la on the left, form a diagrammatic View illustrating one form of remote controlling apparatus embodying my invention applied tothe control of switches and signals. Figs. 2a and 2?), when arranged in similar manner, form a view showing a modified form of a portion of the apparatus shown in Fig. 1. Figs. 3, 4, 5, and 6 are detailed views showing other modifications of a portion of the apparatus illustrated in the preceding figures.

Similar reference characters refer to similar parts in each of the several views.

Referring first to Fig. 1, the reference character X designates a stretch of railway track which is provided with a passing siding Z having two switches l and 2. The stretch of track X is provided with a second siding Y having two switches at and 4. Each ofthe switches l, 2, 3, and l, is protected in the usual manner, by railway signals designated by. the reference characters S, T and U, with exponents corresponding to the location. Referring for example, to switch 5, the signal S controlling facing point movements, is provided with an upper blade for controlling movements along the track X and a lower bladefor controlling movements into the siding Y. Trailing movements through the switch 4 are controlled by signals T and U Each switch is actuated by a motor designated by the reference character M with an exponent corresponding to the location and comprising a field 5 and an armature 5. Each motor is controlled in part by a plurality of contacts which are in turn controlled by the associated switch. Referring, for example to switch 4, contact 7--8 is closed only when the switch occupies its normal position in which it is shown in the drawings, and contact 1-9 is closed only when the switch is reversed. Contacts lll2 and i l-l5 are closed at all times except when the switch is normal,

and contacts Ill-ll and [3-44 are closed at all times except when the switch is reversed.

Each switch motor M is controlled in part by two contactors or relays designated respectively by the reference characters 0 and D with exponents corresponding to the location, and selectively operated from a control point such, for example, as a dispatchers office, as will be explained in detail hereinafter. ciated with each switch are controlled in part by a signal relay H having an exponent corresponding to the reference character of the associated switch. Associated with each switch and its signals are two slow releasing relays E and F, the control of which will appear as the description proceeds.

The track rails adjacent each switch are insulated to form a track section and each track section is provided with a track battery h and with a track relay designated by the reference character R with an exponent corresponding to the location. It follows therefore that each track relay R, is normally energized, but is de-energized when the corresponding track section is occupied by a train. Associated with each track relay is a repeater relay designated by the reference character P with a suitable distinguishing exponent; each relay P being energized when the corresponding track relay R is de-energized. Referring particularly to relay P the circuit for this relay may be traced from the left-hand terminal of battery G through wires 86 and H, back contact N3 of track relay R wire 53, winding of relay P and common wire back to the right-hand terminal of battery G The several groups of train governing apparatus are controlled by selective relays one of which is located adjacent each such group and each of which is designated by the reference character K with a suitable distinguishing exponent. A second selective relay J is associated with each of the switches I, 2, and 3. The selective relays J and K are at times connected in a series circuit which is controlled by a plurality of manually operable push buttons, AN AR AN ARP, etc, located at the dispatchers ofiice. Each of these push buttons comprises two normally open contactszili and 282, and a normally closed contact 203. When the push button is operated, contacts 2.!!! and 2132 close and contact 2&3 opens, the parts returning to their normal positions when released.

In explaining the operation of the apparatus,

I will first assume that the operator wishes to reverse switch 4, which is illustrated in its normal The signals assoposition in the drawings. To accomplish this result, he operates the push button AR. When this occurs, current flows from batteries B B B and E in series, through wires 2i and contact 2632 of push button AR wire 25, back contact 26 of relay P wires 2'! and 28, winding of relay K wire 29, winding of relay J wire 35, winding of relay K wires 3| and 32, back contact 33 of relay P wires 36 and 35, back contact 36 of relay P Wires 3? and 38, winding of relay K wire 39, winding of relay J wire "it, winding of relay J wire 4 i, winding of relay K wires 32 and '33, back contact 44 of relay P and wire 55 through contact 2E1! of push button All-t and wire 4? to battery B It will be seen that the current supplied to this circuit traverses relays K J K K J J and K in series. When the circuit just traced is closed, the combined voltage of batteries B B B and B is applied to this circuit. The arrangement of the parts is such that the current thus supplied to the circuit energizes all the relays, the polar relays operating in the reverse direction to swing their polar armatur-es to the right. When this occurs, a pick-up circuit is closed for relay D from the mid-point of battery G through wires ii) and 55,

front contact 55 of relay R wires 52 and 53, front contact of relay K wire 55, reverse contact E5E3 of relay K wires 5? and 58, winding of relay D wire 59, contact lit-l i operated by switch i, and common wire 2c back to the right-hand terminal of battery G When this pick-up circuit is closed, relay D becomes energized but it should be noted that none of the other relays D, located adjacent switches i, 2 or 3, become energized because the circuit for each of the relays D D and D is open at a back contact on the associated relay J Reverting now to relay D when this relay closes its front contact, a stick circuit is completed over which current flows from battery G through wires "19 an front contact 55 of relay R wires 52 and Gil, back contact 65 of relay 0*, wire 62, front contact 53 of relay D wire 58, winding of relay D wire 59, contact I[l!l operated by switch t, and common Wire 29, back to battery G The push button AR may now be restored to its original position, thereby de-energizing relay K together with the rest of the relays K, and all of the relays J which were energized in series with relay K The pick-up circuit for relay D is therefore interrupted, but relay D remains in its energized condition, due to the stick circuit just traced. The energization of relay D completes a circuit for the switch motor M over which current flows from battery G through wires 56 and 64, front contact 65 of relay R wire 56, front contact 5? of relay D wire 58, armature 5 of motor M wire 59, back contact it of relay C wire I l, front contact "l2 of relay D wire 13, contact l3-i4 operated by switch 4, field 5 of motor M and common wire 29 back to battery G Current supplied to the motor M over this circuit operates the motor in such direction as to move the switch 4 toward its reverse position. As this movement of the switch continues, contacts !8H and l3-M remain closed until the switch has assumed its full reverse position whereupon both of these contacts open. The opening of contact !"--M breaks the motor circuit and prevents the supply of energy to the motor after the stroke of the switch has been completed. Furthermore, the contact ill-4 I breaks the stick circuit for relay D allowing this relay to become de-energized and also opening the motor circuit at front contacts 6? and E2 of relay D It will be noted that since the circuit for Inotor M includes front contact 55 of relay R the switch can not be operated when the track section including the switch is occupied.

The switch 4 now occupies its reverse position so that trains can move over the switch to or from the siding Y. In order to indicate this condition of the switch, it is desirable for the operator to be permitted to clear the signals governing tranic in this direction over switch 4. In order to accomplish this result, the operator again actuates the push button AR. Relays K K K and K and relays J J and J all become energized (relays K in the reverse direction) as has already been explained. The energization of relay K cannot now energize relay D for the reason that contact 18-! l which is included in the pick-up circuit for this relay is now open, since the switch 4 occupies its reverse position. The energization of relay K has therefore no effect upon relay D but a pick-up circuit is closed for the signal relay H current flowing from the mid point of battery G over wires 49 and 59, front contact 5! of relay R wires 52 and 53, front contact 54 of relay K wire 55, reverse contact 56-46 of relay K wire 5'1, back contact 63 of relay D wire 75, contact T9 operated by switch 4, wire 16, winding of relay H wires l7 and 78, front contact IQ of relay E and common wire 26 back to battery G When relay H picks up a branch is closed for the circuit just traced comprising a stick circuit for the relay H and current flows from wire 53, through wire 88, front contact 8! of relay H wire 82, winding of relay H and thence through wires 1'! and I8 and front contact "it of relay E and common wire back to battery G It will be plain therefore that after relay H has once been picked up, it is subsequentiy maintained in its energized condition independently of the condition of front contact 5d of relay K by virtue of its stick circuit. The operator may, therefore, release push button AR, thereby de-energizing relays J and K without deenergizing relay H. I

When relay H becomes energized two signal circuits are completed, one for clearing the lower blade of signal S and the other for clearing signal U The circuit for signal U may be traced from battery G through wires 49, 84, 85 and 38, front contact 87 of relay H wire 88, contact 89-89 controlled by switch 4, wire 90, operating mechanism of signal 13*, and common wire 20 back to battery G The circuit for the lower blade of signal S is similar to the circuit for signal U Xcept that it contains front contact iii of relay H and contact 9292" operated by switch 4. It follows therefore that both signals U and S are cleared to permit traffic moves over the switch 4 to or from the passing siding Y.

Of course it should be understood that in actual practice the signal circuits might be controlled by track circuits not shown in the drawings or by any other suitable means to prevent the possibility of simultaneously clearing opposing signals. Signal circuits for accomplishing this result are well known in the art and have been omitted from the present disclosure for the sake of simplicity.

It will be noticed that the pick-up circuit for relay H includes front contact 19 of relay E which latter relay is normally energized over a circuit including back contact 93 of relay H and back contact 94 of relay F When relay H picks up, however, relay E is deenergized, due to the opening of back contact 93 of relay H and relay F becomes energized, the circuit for this relay including front contact 93 of relay H When relay E releases, the circuit for relay H previously traced is interrupted, but if the push button AR is restored, before front contact 19 of relay E opens, a branch is completed around contact 79, from wire Tl, through back contact 95 of relay K and wire 2% to common wire 20. The relay E is made slow releasing in order to bridge the time interval beginning when relay H picks up and ending when relay K releases, due to the restoration of push button Al to its original condition. With relay K de-energized, relay H is held energized by its stick circuit although relay E is open.

Under these conditions, if the operator wishes to place the signals U and S at stop, he may do so by again operating the push button A3 When this occurs, relays J are all energized and K are all energized in the reverse direction. The energization of relay K thus opens back contact 95 and breaks one branch of the circuit for relay H which therefore becomes ole-energized because the other branch of its circuit is now open at front contact !9 of relay E and can not become closed until relay F drops to energize relay E following the de-energization of relay H If, however, the operator, after reversing push button AR to release relay H restores it to its original condition at any time prior to the closing of back contact 9 3 of relay F the relay K is released before relay E picks up so that relay H remains in its tie-energized condition. With relay H released, of course, the signal circuits for signals U and S are open, and these signals are returned to their stop positions.

If the operator wishes to restore the switch t to its normal position, he reverses the push button AM. This operation connects the batteries B B B and B with wires 46 and 25, and in similar manner to the operation of push button ARA But it should be noted that the polarity of the current supplied to these conductors is now reversed. The operation of push button AN therefore energizes all of the relays K and J, but relays K now become energized in the normal direction so that their polar armatures are swung to the left. The energization of relay K in its normal direction picks up relay C and subsequently holds this relay in its energized position after push button AN is restored to its normal position by virtue of circuits similar to those already traced for relay D when relay K is energized in the reverse direction. The control of the motor M by relay C in returning the switch from its reverse to its normal position is similar to the control of this motor by relay D in moving the switch from normal to reverse and the circuits Will not be traced in detail.

If, after the switch has been restored to its normal position the operator wishes to clear the signals controlling traflic movements over this switch, he may do so by again operating push button AN thereby picking up relay K in its normal direction. With switch t normal, the normal energization of relay K can not pick up relay C but relay H does become energized, the pick-up circuit for this relay passing from battery G through wires 49 and 51], front contact 5! of relay R wires 52 and 53, front contact 54 of relay K wire 55, normal contact 5856 of relay K wire 22, back contact 96 of relay C wire 91, contact 'l-8 operated by switch it, wire 76, winding of relay H wires H and i8, front contact 19 of relay E and common wire 2e back to battery G As soon as relay H becomes energized, a stick circuit is closed for this relay similar-to the stick circuit previously traced for the relay in connection with the operation of the apparatus to clear the signals for a move with the switch t reversed. Push button AN may therefore be restored to its normal position. When relay K is released its back contact 95 closes a branch for the stick circuit of relay H around front contact ll? of relay E t will be noted that when relay H picks up, relay E is deenergized and relay F becomes energized. The. circuit for relay H through front contact 19 of relay E is therefore open and the closing of back contact 95 of relay K is necessary to maintain relay H in its energized condition. When relay H becomes energized, current flows from battery G through wires 19, 3d, 85 and 86, front contact 81 of relay H Wire 88, contact 89-83 operated by switch i, operating mechanism of signal T and common wire as back to battery G Similarly, current also flows from battery G through wires 49, 8 and 85, front contact iii of relay H wire S8, contact 92-43% operated by switch 6, operating mechanism of the upper blade of signal S and common wire 20 back to battery G Under these conditions, then, signal T and the upper blade of signal S are cleared to indicate e that movements of traffic may be made over the switch 3 along the stretch of track X.

If, now, the operator wishes to restore the signals to the stop position, he may do so by again operating the push button AN When this occurs relay K becomes energized, thereby opening the. stick circuit for relay H at back contact 95 of relay K Relay 1-1 therefore releases and the signal circuits just traced are interrupted to permit the signals to return to the stop position. Of course when relay H releases, relay F becomes ole-energized and relay E picks up. When the. operator restores push button AN to its original position, therefore, the apparatus is restored to the condition in which it is illustrated in the drawings.

It will be observed from the foregoing that the several traffic controlling devices located adjacent the switch 4 may be successively operated from the control point in a predetermined sequence by repeated momentary operation of the same push button. That is to say, if the switch is normal and the signals are at stop, the. first operation of the push button AR reverses the switch, a

second operation of the same push button clears the signals, and a third operation of the same push button restores the signals to stop. Similarly, if the switch is reversed, the first operation of the push button AN moves the switch to nor mal, a second operation of the push button clears the signals, and the. third operation of the push button restores the signals to stop.

In order to select between the various groups of traffic governing devices for the purpose of operating a signal device in any selected group, the relays K are constructed with progressively higher resistances, and the several push buttons located in the dispatchers oflice, in addition to permitting impulses of opposite polarities to be impressed upon the wires 25 and Alt are arranged to supply current impulses of different magnitudes. to these wires. For example, when push button AR is reversed, current is supplied only from batteries B B and B and this current is of such direction as to energize the relays K in the reverse direction. But the magnitude of the current supplied to these. relays under these conditions not sufiicient to energize relays K and J though relays K K and K become energized in the reverse direction and relays J 1 and J also pick up. In similar manner, operation of push button AN closes relays J and J and energizes relays K K and K in the normal direction, but does not energize relays J or K Furthermore, operation of push buttons AN and AR closes relay J and energizes relays K and K in the normal or reverse directions, respectively from batteries B and B only and does not effect the remaining relays K and J. Finally, operation of push button AN energizes relay K in the normal direction, and operation of push button AR energizes relay K in the reverse direction, but the operation of the two push buttons last mentioned supplies current only from battery B to the wires 25 and 46 and hence none of the relays K or J except relay K is energized by operation of push buttons AN or AR It should be noted, however, that operation of any of the push buttons supplies current of a certain magnitude and polarity to all of the relays J and IQ over the circuit first traced for these relays, which circuit includes the relays in series.

In explaining the selection between the several groups of trafiic governing devices, I will next assume that the operator actuates push button ARR As explained hereinbefore, this results in the closing of relay J and the energization of relays K and K in the reverse direction, but does not effect the remaining relays J and K. Since relays K and K remain in their de-energized conditions, none of the apparatus associated with switches 3 or 4 is affected. At switch 2, however, the reverse energization of relay K picks up relay 1) by means of a pick-up circuit similar to the pick-up circuit already traced for relay D with the single exception that the circuit for relay D includes back contact 99 of relay J The purpose of this contact, as has already been explained is to prevent operation of relay D when relay J is energized, as by operation of AN AR AN or AR. The successive operation of the switch motor M the signal relay I-I and the other parts of the apparatus associated with switch 2, is similar to the operation of corresponding parts located at switch 4 and will be understood from the foregoing explanation without further description. It will be apparent, therefore, that the operator at the dispatchers office, by closing the proper one of the push buttons, may operate one of the traffic governing devices in any selected one of the several groups associated with the separate switches. If he then restores the push button and operates it a second time, a second device in the same selected group is operated. By thus arranging the circuits, so that successive operation of a single push button causes successive operations of different functions, a material saving in line wires is eifected.

In order to inform the operator at the control point when a train has left one of the track circuits, I have provided two polarized relays Q and V, adjacent the control point. These relays are normally connected in series across the wires 25 and 46 through normally closed contacts on the push buttons AN AR etc., and are arranged to respond selectively to impulses of diiferent polarities and current strengths. For example, I will assume that a train occupies the track circuit including switch 4. Relay R is therefore tie-energized and relay P is picked up. When the train leaves the section, relay R immediately becomes energized, thereby opening the circuit for relay P. But due to the slow-acting characteristics of relay P an interval of time elapses,

during which relays R and P are both closed. During this brief interval of time, an impulse of energy is supplied from battery G over wires l6 and I1, front contact l8 of relay R wire Hll, front contact I02 of relay P wire 25, wire I03, winding of relay V, wire I04, winding of relay Q, wire H15, thence through contact 203 of each of the push buttons AR AN etc., in their normal positions to wire 46, and thence back to battery G When this circuit is closed, current from the entire battery G is supplied to relays Q and V and the strength of this current is sufficient to energize both relays. The polarity of this current, furthermore, is such as to energize the relays in their reverse directions, thereby swinging their polar contacts tothe right. With relay V energized in the reverse direction, current flows from battery j, through wire [06, front contact I01 of relay V, wire I98, reverse contact I09 of relay V, through the right-hand winding of relay d", and wire H6, back to battery I. The armature of relay d is therefore swung to the right so that a circuit is completed from battery I, through wires HI and H2, lamp H3, contact H4 of relay 1 and wires H5 and H0 back to battery f. It follows therefore that when a train passes out of the track circuit including switch l, an impulse of energy is delivered to the relay V, which results in a reversal of relay d*. The lighting of lamp H3 therefore informs the operator that the train has left the section including the switch t. This indication is ordinarily known as an OS indication. After the relay (1 has once been energized, the armature remains in the position to which it was last moved so that the indication presented by the lighting of lamp H3 persists until the relay d is positively reversed. This may be accomplished by closing the manually operable circuit controller H6, whereupon current fiows from battery 1, through wire Ill, circuit controller H6, wire H1, the left-hand winding of relay :1 and wire H0 back to battery 1. It should be noted that the left-hand winding of each of the relays d is included in this circuit in parallel, so that the operation of the circuit controller H6 restores any one or more of the relays d which may happen to be reversed.

The circuit for giving the OS indication from each of the remaining track circuits is similar to that just described in connection with the OS indication from the track circuit including switch 3. But in giving the OS indication from the track circuit including switch 3, it should be noted that during the brief instant that relays R and P are both closed, the impulse which is delivered to relays Q and V is of the full battery strength of G but is of the opposite polarity from the impulse of current supplied to relays Q and V from battery G when relays R and P are energized. As a result of the OS indication from location 3, therefore, relays Q and V are both energized in the normal direction and under these conditions relay d is reversed and lamp H8 becomes lighted. Furthermore, when relays R and P are both energized for an instant after the passage of a. train out of the track circuit including the switch 2, an impulse of current from one-half of battery G is supplied to relays Q and V. The parts are so proportioned that this current is of sufiicient strength to energize relay Q in the reverse direction but relay V is not affected, and current then flows from battery I, over back contact I01 of relay V, front contact H9 of relay Q, and reverse contact I20 of relay Q, to the right-hand winding of relay d The armature of relay d then swings to the right and lamp I2! is therefore lighted to give the operator the OS indication from switch 2. Finally, the OS indication from switch 5 energizes relay Q in the normal direction but does not energize relay V, and when this occurs, relay d is operated to light lamp i222. It should be pointed out that operation of the circuit controller H6 will restore any of the relays d which may happen to be reversed.

It should also be pointed out that the circuit over which the relays Q and V receive the OS indication from the various signal locations, includes a normally closed contact 293 on each of the push buttons AN ARK etc. It follows that an OS indication can be received only when all of the push buttons occupy their normal positions. When any one of the push buttons is reversed to supply selective impulses to the wires 25 and it, the OS indication circuit is broken and the relays Q and V can not then be operated by an impulse of energy from batteries B' B etc.

It has been pointed out that if the track circuit adjacent any switch is occupied, the consequent de-energization of the track relay for such section prevents the operation of any of the devices located in that group. It should also be pointed out that in the main selecting circuit including the relays J and K in series, each relay K and the adjacent relay J are connected in the circuit over a back contact of the corresponding repeater relay P. For example, a portion of this main selecting circuit passes from wire 34 between locations 2 and 3, through wire 35, back contact 36 of relay P wires 37 and 38, Winding of relay K wire 39, winding of relay J wire ill, and thence to the apparatus located adjacent switch i. It will be noted that this circuit includes the back contact 36 of relay P But if a train were occupying the track circuit including the switch 2, relay P would be energized, so that the circuit just traced would be open. Under the conditions described, however, back contact lull of relay R would be closed so that a branch would be completed around back contact 35 of relay P to prevent interruption of the continuity of the main controlling circuit including the relays J and K in series. With this arrangement even through relay R is de-energized to prevent operation of any of the devices located adjacent the switch 2, signal impulses can be sent from the control cabin to any of the other groups of devices to operate devices in such groups, although no device can be operated in the group adjacent switch 2. Furthermore, when the train moves out of the section including switch 2, at the instant that relays R and P are both energized to send an OS indication to the control point, relays K and J are disconnected from wires 34, so the impulse delivered to wires 25 and 46 for operating relay Q does not operate relays J and K.

Referring now to Fig. 2, the apparatus shown in this view is similar to that already described in connection with Fig. 1, except that certain of the indications are received at location 2 and are relayed thence to the control point by auxiliary apparatus in order to save line Wires. In explaining the operation of the apparatus, I will first assume that the operator wishes to reverse switch 4. He first actuates the push button AR to complete the following circuit: From batteries B B B and B in series, through wire 2!, contact 2%2 of push button AR wire 25, back contact l 25 of a normally de-energized relay L, wires I26 and llll, back contact I28 of relay P wires I29 and E38, winding of relay K wire #35, winding of relay K wire E32, winding of relay K wire ill, winding of relay J wire ll, winding of relay K wires and 63, back contact a l of relay P conductor contact Bill of push button AIM, and wire i'i back to battery E When this circuit is closed, the strength and polarity of the current supplied by the batteries B B B and B is such that all of the relays included in the circuit just traced become energized, the polar relays in the reverse direction. It should be understood that in accordance with the explanation already made in connection with Fig. 1, should the operator have operated push button AR current would have been supplied over the circuit just traced, but relay K would not have been energized, although the remaining polar relays in the circuit would have become energized in their reverse direction. Returning to the assumption that relay K has become energized; since relay K is energized, current from battery N flows through wire l33, reverse contact I3 3 of relay K Wire 52%, back contact E25 of relay L, conductor 25, back contact l23 of relay P wires $2 1 and E35, winding of relay k wire 2Q, winding of relay J wire 3!], winding of relay k wires 3i and 322, back contact 33 of relay P wire front contact wt of relay K wire I31, reverse contact i553 of relay K wire its, front contact Hit of relay K and wire it! back to battery N. Current from battery N thus supplied to relays J J and k energizes these three relays, the two latter relays becoming energized in the reverse direction. Relay k controls the apparatus located adjacent switchfl in a manner similar in general to the control of the apparatus located adjacent switch i in Fig. l. but two additional relays a and b are located adjacent switch ll, the functions of which I will now explain.

It will be remembered that with the apparatus shown in Fig. 1, the circuit for relay H4 includes contacts l'8 or 8-43 operated by switch l. It is impossible, therefore, to energize relay H to clear the signals unless the switch occupies one extreme position or the other. That is to say, after the operator has initiated a switch movement, he must wait until the switch has attained its extreme position before he can energize relay H to clear the signal. This performance requires 20 or 30 seconds, and in order to prevent this delay I have provided the relays a and 1). Relay a is provided with a circuit which may be traced from battery G through wires 49, 50, ldl and H523, back contact are of relay C wire Md, winding of relay, a, and common wire 28 back to battery G It follows, therefore, that relay a is energized when relay C is de-energized. In similar manner, relay 1) is controlled by back contact M of relay D, so that relay b is energized when relay D is de-energized. Assuming first that relay 70 has been energized in the reverse direction to cause operation of switch t from its normal to its reverse position, the energization of relay D de-energizes relay b. At the expiration of the time interval required for a reversal of the switch, relay 1), becomes deenergized, thereby picking up relay 17. During the transit of the switch, however, the relay 1) is de-energized and if the operator actuates push button AR during this time interval to energize relay K and therefore to energize relay k in the reverse direction, a circuit is closed for relay H which may be traced from battery G through wires l9 and 553, front contact 5! of relay R wires 52 and 53, front contact 54 of relay k wire 55, reverse contact 56 of relay k wire 51, back contact I46 of relay b, wire I48, winding of relay H wires 11 and 18, front contact 19 of relay E and common wire 20 back to battery G It is therefore possible to pick up relay H to clear the signals before the transit of the switch is completed. After the switch movement is completed so that relay D is deenergized and relay 1) is energized, wire 51 is connected over front contact I46 of relay b with wire I41, and hence with back contact 63 of relay D Under these conditions, therefore, the circuit for relay H is the same as has already been described in connection with Fig. 1 and the operation of the apparatus is the same as before. In similar manner, the relay 0., becoming deenergized when relay picks up, permits the signals to be cleared during switch movements from reverse to normal. In all other respects the operation of the apparatus located adjacent switch 4 is the same as in Fig. l.

The OS indication from switch 4 is transmitted to the control cabin in the following manner: When a train leaves the track section containing switch 4 during the time interval that relays R and P are both closed, current from battery G4 flows over wires 49, t) and MI, front contact I8 of relay R wire itl, front contact I62 of relay P Wire 25, winding of relay L, wire I49, back contact I36 of relay K and wires 34 and I50, back to battery G The impulse of current supplied to this circuit energizes relay L in the reverse direction, thereby completing a circuit from battery G through wires I5I and I52, reverse contact I53 of relay L, wire I 54, front contact I of relay L, wire 25, thence through relays V and Q and contacts 203 of each of the push buttons AN AR etc. in their normal positions and through wire 45, front contact I55 of relay L, wire I56, reverse contact I51 of relay L, and wires I58 and H59, back to battery G The impulse of energy supplied to relays Q and V under these conditions energizes relays Q and V in the reverse direction in the same manner as the OS indication transmitted to these relays from switch 4 in Fig. l. Reday d is therefore energized in, the reverse direction to light lamp I I3 and give an OS indication from switch 4.

Although I have described the operation of the apparatus located at switch 4, it will be readily understood that should the operator actuate push buttons AN or AR the apparatus at switch 3 will be operated, since a portion only of battery N is then connected with wires 25 and I59, the selection between relay k and relay lc being accomplished by current strength and polarity under the control of relays K and K located adjacent switch 2. In similar manner, should a train leave the track circuit including switch 3, the OS indication transmitted by relays R and P would energize relay L in the normal direction, thereby energizing relays Q and V in the normal direction, and reversing relay (1 at the control point to light lamp I I8.

The operation of the apparatus located at switches I and 2 for the control of the switch shifting means, and the signals at the locations, is precisely the same as in Fig. 1.

It should also be pointed out that relays similar to relays a and b at location 4 could be installed at any of the other locations to permit the operator to initiate the clearing of the signals before the switch movement is completed.

An alternate arrangement of apparatus for controlling the relays C and D is illustrated in Fig. 3 as applied to the group of trafiic governing devices associated with switch 4. In this arrangement of apparatus, the relays C and D are controlled in part by selecting apparatus here represented as a selector 9 comprising three contacts Ifiii-IGI, E6DI52, and I6l-I63. The selector may be of any suitable type, and is controlled from a remote point in such manner that any one of its contacts may be closed for a brief interval. As shown in the drawings, the switch 4 occupies its normal position. If the operator wishes to cause operation of the switch to its reverse position, he actuates the selector 9 to close contact I6il-I 62 for a brief interval. When this happens, current flows from terminal :0, of a suitable source of energy not shown in the drawings, through contact MiG-I62 of selector 9, wire I64, winding of relay D and back to terminal 1/ of the same source. The relays C and D control the switch motor M not shown in Fig. 3, in the same manner as has already been described in connection with Figs. 1 and 2, so that when relay D becomes energized, the motor is actuated to reverse the switch 4. The selector 9 may be restored to its normal position as soon as the relay D becomes energized; the relay D does not open however, because it is held in its energized condition by virtue of a stick circuit which passes from terminal x, through contact IEIIi operated by switch 4, wire i66, back contact I51 of relay C Wire I68, front contact I89 of relay D wire I10, and winding of relay D to terminal 1 The relay D therefore remains closed until contact Iii-II opens at a point near the end of the reverse stroke of the switch 4, whereupon the relay opens to ole-energize the switch operating motor.

When the switch has attained its full reverse position, contact 8-9 closes. If the operator wishes to clear the signals controlling the switch, he may do so by again closing contact I60I62 of selector 9', thereby again picking up relay D Current then flows from terminal as, through contact 3-9 operated by switch 4, wires HI, and I12, front contact I13 of relay D wires I14, I80 and IN, winding of relay H wire I15, back contact i it of relay 1", and wire I11 to terminal 1/. Relay H therefore becomes energized and this relay may be utilized to control the signal cir cuits in the same manner as in Figs. 1 and 2. As soon as relay H has closed its front contacts the selector g may be restored to its original condition, relay H subsequently remaining energized by virtue of its stick circuit from terminal 1:, through contact 3-% operated by switch 4, wires HI and 513, front contact I18 of relay H and wires I80 and EM, winding of relay H wire I15, back contact N6 of relay r, and wire i11 to terminal 1 It will be apparent therefore, that relay H will remain picked up after having once been energized as long as relay r is tie-energized and the switch occupies its reverse position. If the operator wishes to de-energize relay H to restore the signals to the stop positions, he closes contact I5liI6I, whereupon current flows from terminal at, through contact IGil-I6I, wire I82, winding of relay 1', wire I83, to terminal y. Relay 1- therefore becomes energized, opening its back contact 2'16, and breaking the stick circuit for relay H The signal control relay H therefore becomes tie-energized and this relay may again be energized only by manipulation of the selector 9 to close the pick-up circuit for the relay.

The control of relay C is similar to the control switch completes its movement.

' for relay H a second contact.

of relay D and the operation of the apparatus for switch movements from reverse to normal and for clearing the appropriate signals will be understood without further explanation.

In Fig. 4 the control circuits for relays C and D are the same as in Fig. 3. In Fig. 4, however, after the selector g has been operated to pick up relay D, the switch 4 controls a contact ill J58 similar to contact iii-i i, and a contact it ii !l3 similar to contact I li 2, and the pick-up circuit for relay H is closed automatically, as soon as the actual. movement of the switch has commenced. This pickup circuit passes from terminal a, through contact i9ti t' operated by switch Q, wires ill and H2, front contact iii of relay D wires H4, i843 and ESQ, winding of relay H wire I75, back contact H6 of relay and wire iii to terminal y. The relay H may control the signals governing traffic movements over switch :2, in the same manner as in Figs. 1 and 2, and with this arrangement, it will be manifest that relay H becomes energized automatically as soon the transit of the switch commences, the signals will be cleared automatically as soon as the After the relay H has once been picked up, it is subsequently maintained in its energized condition by a stick circuit from terminal r, through contact Hit-49% wires ill and H8, front contact H9 of relay H wires lSli and E535, winding of relay 5 wire W5, back contact lit of relay r, and wire ill to terminal y.

If the operator does not wish to clear the signals at the time the switch is reversed, he may release relay H before the switch completes its movement by operating the selector g to close contact l5@l6l as soon as relay D becomes energized. Current then flows from terminal at, through contact HEB-469, wire H32, winding of relay r, and wire I83 to terminal y. The closing of contact I86 of relay r completes a stick circuit for this relay which passes from terminal x, through front contact w ll of relay D wire I85, front contact iBB of relay r, Wire H81, winding of relay 1, and wire 83 to terminal 1/. When relay 1' picks up, it opens its back contact HS included in the pickup and stick circuits of relay H so that relay H will be released, while if the selector contact i6ill6i is closed prior to operation of relay H relay H will not become energized. -In either case, relay H will remain deenergized after relay r picks up as long as the switch is in transit, because relay T will be held in its energized position by virtue of its stick circuit as long as relay D is energized to reverse the switch. When relay D becomes de-energized, front contact ta l of this relay opens, thereby breaking the stick circuit for relay 1, allowing this relay to open. But relay H can not now be picked up automatically, because its pick-up circuit is open at front contact l'l3 of relay D If the operator wishes to clear the signals, he may do so by again closing contact l6lllfi2 of selector g. This operation energizes relay D thereby completing the pick-up circuit The control of relay C by contact Hit-I83 of selector 9 is similar to the control of relay D by contact ififi-ifi2 and will be readily understood from the drawings.

It should be pointed out that there is a slight difference in the operation of the systems disclosed in Figs. 3 and 4. In Fig. 3 the operator closes a contact to reverse the switch, and again closes the same contact to clear the associated signals. He may then place the signals at stop by closing In Fig. 4, however, the operator closes one contact to reverse the switch. When the transit of the switch has commenced, the signal control relay is automatically energized to clear the signals without requiring further action on the part of the operator, but he may, if he wishes, prevent the automatic clearing of the signals by closing a second contact. In Fig. 4, if the operator does prevent or nullify the automatic operation of relay H he must deliberately close a selector contact to energize relay H if he wishes to clear the signals.

Referring now to Fig. 5, the apparatus disclosed in this view is similar to the system shown in Fig. except that the signal control relay H is omitted. In Fig. 5, if the operator wishes to reverse the switch, he closes contact |6@|t2 of selector 9 to energize relay D as has been explained in connection with Fig. 3. The energization of relay D reverses the switch and at the same time completes a stick circuit for the relay through contact iil-l i operated by switch t, back contact iii? of relay 0*, and front contact I69 of relay D in the same manner as in Figs. 3 and 4. After the switch has attained its reverse position, relay D is held closed by another stick circuit which passes from terminal at, through wire 1%, back contact lQii of relay 1, wire E98, contact 89 operated by switch t, wire H39, front contact i9 3 of relay D wires tilt and M8, and winding of relay D back to terminal 1/. Relay D is maintained in its energized condition over the stick circuit just traced, as long as the switch is in its reverse position and relay 1', is de-energized, although the selector g may be restored to its original condition. With relay D energized, and with the switch in its reverse position, current flows from terminal :r, over front contact I92 of relay D wire i533, contact 92-92 operated by switch l, wire Eiiil, operating mechanism of signal U and wires 29!, 292 and 283, to terminal y.

Current also flows from contact 922 through wire iii-i, operating mechanism of the lower blade of signal S and wire 293 to terminal y. When the circuits just traced are closed, therefore, signal U and the lower blade of signal S are cleared to permit trafiic moves over the switch t to or from the passing siding Y. It should be pointed out that the signals cannot be cleared by energization of relay D until the switch has assumed its reverse position.

It will be plain from the drawings that by energizaticn of relay C the switch may be restored to its normal position and the signal T and the upper blade of signal S may be cleared over circuits which are similar to those just described in connection with switch movements from normal to reverse and the operation of the signals governing such movements.

Returning to the assumption that relay D has been energized and is being held by its stick circuit over back contact iii?) of relay r, the operator may restore the signals to the stop positions by closing contact ltd-2 5i of selector 9, thereby energizing relay 9', and opening back contact m5. This operation causes relay D to be die-energized, breaking the control circuits for signal U and the lower blade of signal S at front contact E92 of relay D The signals are therefore returned to their stop positions and may again be placed at clear only by again picking up relay D by closing contact lfifiiii2 of selector g. The 0peraticn of the apparatus shown in Fig. 5 is therefore similar to that described in connection with Fig. 4, in that the closing of contact l68-l62 or let-463 causes the operation of the switch to the corresponding position and the automatic clearing of the signals for the route determined by the sw'. ch position, and the closing of contact Hid-56! restores all signals to the stop position.

Referring now to Fig. 6, the apparatus here shown is similar to that disclosed in Fig. 3 with the exception that relay 1' is made slow acting and is controlled by a second slow acting relay p in addition to the sel ctcr g. With the apparatus shown in Fig. 6, the operate may reverse the switch i by closing contact Gail-462 of selector g. Relay D then picks up, and is stuck up over back contact 5552 of relay and contact 52-h until the switch has moved to its reverse position, whereupon relay D becomes ole-energized. If the operator then closes contact EBB-dd? of selector 9 a second time, relay H is picked up and stuck up in the same manner as in Fig. 3, thereby clearing the signals associated with switch l. It will be noticed that the relay H is stuck up over a back contact of relay 7' and that the circuit for relay p from terninal ove back contact 2 it of relay H Wire 25 5, a. cl windin of relay p, to terminal 3 is now opened that relay 73 becomes tie-energized. If the operator wishes to restore the signals to stop, h may do so by closing either contact of selector g. If contact iiifi-lli2 is closed when relay p is released current flows from terminal :12, through contact Hit-A 22 of selector 9, wires i6 and baclc contact 259 of relay p, wire 22%, and winding of relay 1 to terminal y. Relay 1' thereupon becomes energized, opening at back contact lit thereon, the stick circuit for relay H so that the relay opens to restore the signal to stop.

The operation of the apparatus in moving the switch from reverse to normal, and in clearing the corresponding signals is s' ilar to that just described in moving the switcn from normal to reverse, and will be understood without further explanation.

It should be noted that relay p becomes deenergized soon as relay II picks up in response to the closing of contact ital-452 of selector 9, but relay p is slow-acting, and therefore does not close its back contacts for a time interval long enough to insure that the selector contact will open before relay p closes its back contact. Relay 1 is also made slow acting so that after this relay becomes tie-energized, due to the opening of the selector contact, a time interval will elapse before its back contacts become closed, and relay D will release before relay r releases and will open contact in pickup circuit of relay 3 before back contact closes, to insure that relay H does not again pick up on the same impulse that energizes relay 1".

J. the

It will be observed that in Figs. 3, 4, 5, and 6,

I have illustrated only a portion of the apparatus located adjacent switch l, but it is manifest that similar apparatus to that shown in these views could be associated with any reasonable number of groups of railway traiiic governing devices and that these groups could be selectively controlled by apparatus under the control of an operator at a control point in exactly the same manner as has already been described in connection with Figs. 1 and 2.

In describing my invention I have disclosed apparatus for performing certain functions such as controlling switches and signals; and for returning certain indications to the dispatchers ofiice, but it is apparent that the invention is not limited to this particular arrangement.

In the above description, I have pointed out that one feature of my invention is the provision, in systems of the type here contemplated, of means for performing one function in response to a first operation of a control element, and for perform-- ing a different function in response to a repeated identical operation of the same element. This broad idea is disclosed but is not claimed in my copending application, Serial No. 235,245, filed November 23, 1927, for Railway trafiic controlling apparatus.

Although I have herein shown and described only a few forms of remote controlling apparatus embodying my invention, it is understood that various changes and modifications may be made therein within the scope of the appended claims without departing from the spirit and scope of my invention.

Having thus described my invention, what I claim is:

I. In combination with a stretch of track having a plurality of switches located at intervals along such stretch, a plurality of polarized relays one associated with each switch and requiring currents of different magnitudes to energize the relays, a source of current at times connected with all said relays, manually operable means for controlling the magnitude and polarity of the current supplied to such relays and means controlled by each relay for controlling the associated switch.

2. In combination a first and a second traflic governing device located at spaced points, a first relay adjacent the first device, a second and a third relay adjacent said first and second devices respectively and requiring for their operation a different magnitude of current than said first relay, means controlled by said first and second relays for operating said first device, means con trolled by said third relay for operating the second device, and means for at times supplying currents of difierent magnitudes to said three relays in series for selectively controlling said devices.

3. In combination, a railway switch having a normal and a reverse position, a first trackway signal for governing traflic over said switch in its normal position, a second signal for governing traffic over the switch in its reverse position, a pola'ized relay, means for energizing said polar ized relay in one direction or the other, means effective when said polarized relay is energized in either direction to move the switch to a corresponding position, a second relay, means effective when said polarized relay is subsequently energized in either direction and when the switch occupies a corresponding position to energize said second relay, and means controlled by a front contact of said second relay for operating said first or said second signal according as the switch occupies its normal or reverse position.

i. In combination with a railway switch, a polarized relay, means for at times supplying said polarized relay with current impulses of one polarity or another, means set into operation by energization of the polarized relay to move the switch to its normal or reverse position depending upon the direction of energization of said relay, a signal control relay, a slow-acting relay controlled by said signal control relay, a pick-up circuit for said signal control relay responsive to the position of the switch and controlled by said polarized relay and by said slow-acting relay, 2. stick circuit for the signal control relay controlled by the polarized relay but not by said slow-acting relay, and signals for governing traffic over said switch and controlled by said signal control relay and by said switch.

5. In combination with a railway switch, a polarized relay controlled from a point remote from the switch, a second relay controlled by normal and front contacts on the polarized relay and by the position of the switch, a third relay controlled by reverse and front contacts of the polarized relay and by the position of the switch, means for moving the switch to its normal or reverse position. according as said second or third relay is energized, a fourth relay, a fifth relay having a circuit including a back contact of said fourth relay, a first and second contact closed when the switch is normal and reverse respectively; a pick-up circuit for said fourth relay including front and normal contacts on the polarized relay, a back contact of said second relay, said first contact, and a front contact of said fifth relay; a second pick-up circuit for the fourth relay including front and reverse contacts of the polarized relay, a back contact of the third relay, said second contact, and a front contact of the fifth relay; a stick circuit for the fourth relay including its own front contact and a back contact of the polarized relay; and signals for governing traflic over said switch and controlled by the fourth relay and by the switch.

6. In combination, a group of traffic governing devices, apparatus effective when operated to actuate one such device, means responsive to a second identical operation of such apparatus to actuate a different one of the devices in said group, and means responsive to a third identical operation of such apparatus to restore said different device to its original condition.

'7. In combination with a railway switch, a signal governing traffic over said switch, a manually operable push button, means responsive to a first operation of said push button to move the switch to a predetermined position, means responsive toa second operation of said push button to operate the signal, and means responsive toa third operation of the push button to restore the signal to its original position.

8. In combination with a stretch of track having a plurality of traffic governing devices located at intervals along said stretch, a plurality of relays one for each such device and requiring currents of different characters to operate the relays, means located at a control point for supplying currents of different characters to a circuit including all said relays, means controlled by each relay for operating the associated device, means controlled by traffic conditions adjacent the several devices for supplying currents of difierent characters to a portion of said circuit, and means located at the control point and selectively responsive to said last mentioned currents.

'9. In combination with a stretch of railway track, a plurality of traffic governing devices located at intervals along said stretch, a first group of relays requiring currents of different characters to operate the relays, means located at a control point for supplying current of different characters to all the relays of the first group, means controlled by certain of the relays of the first group for controlling certain of said traflic governing devices, a second group of relays requiring currents of different characters to operate the relays, means controlled by the remaining relays of the first group for at times supplying currents of different characters to all the relays of the second group, and means controlled by the relays of the second group for selectively controlling the remaining traflic governing devices.

10. In combination with a stretch of railway track, a plurality of traflic governing devices located at intervals along said stretch, a first group of relays requiring currents of different characters to operate the relays, means located at a control point for supplying current of different characters to a first circuitincluding all the relays or" such first group, means controlled by certain of the relays of the first group for controlling certain of said trafiic governing devices, a second group of relays requiring currents of different characters to operate the relays, means controlled by the remaining relays of the first group for at times supplying currents of different characters to a second circuit including all the relays of such second group, means controlled by the relays of the second group for selectively controlling the remaining traffic governing devices, means controlled by traffic conditions adjacent said remaining devices for at times supplying currents of different characters toa portion of said second circuit, apparatus selectively responsive to such last mentioned currents, means controlled by trafiic conditions adjacent said cer- 'tain devices and by said apparatus for at times supplying currents of different characters to a portion of said first circuit, and means located at said control point selectively responsive to such last mentioned currents to indicate traffic conditions adjacent the separate devices.

11. In combination, a line circuit containing a polar relay and a neutral relay requiring for their operation currents of different magnitudes, means for supplying said circuit with currents of different magnitudes and polarities, a railway trafiic governing device, and means effective when said neutral relay is deenergized to control said device in accordance as said polar relay is energized by current of one polarity or another.

12. In combination with a plurality of railway trafiic governing devices located at two spaced points, two polar relays one at each said point requiring for their operation currents of different magnitudes, a neutral relay at one said point requiring for its operation the same magnitude of current as the polar relay at the other point, a series line circuit including said polar relays and said neutral relay, means for supplying said line circuit with currents of different strengths and polarities, means controlled by one polar relay for controlling one said governing device, and means controlled jointly by the other polar relay and the associated neutral relay for controlling the other said governing device.

13. In combination with a plurality of railway traific governing devices located at spaced points, a plurality of polar relays one at each said point and requiring for their operation currents of different magnitudes, a neutral relay at one point requiring for its operation the same magnitude of current as the polar relay at the adjacent point, a series line circuit including said polar relays and said neutral relay, means for supplying said line circuit with currents of different strengths and polarities, and means effective only when said neutral relay is deenergized for controlling the corresponding governing device in accordance with the energization of the associated polar relay by current of one polarity or another.

14. In combination with a plurality of railway trafficgoverning devices located at two spaced points, two polar relays one at each said point and requiring for their operation currents of different magnitudes, a neutral relay associated with the polar relay requiring the smaller magnitude of current, said neutral relay requiring for its operation the same magnitude of current as the polar relay at the other point, a series line circuit including said polar relays and said neutral relay, means for supplying said line circuit with currents of different strengths and polarities, means for controlling one governing device by the polar relay requiring the greater magnitude of current, and means for controlling the other governing device by the polar relay requiring the smaller magnitude of current provided the associated neutral relay is deenergized.

15. In combination, a stretch of railway track, a plurality of traffic governing devices for directing traific through said stretch, a manually operable device, a stick relay having pick-up and stick circuits one of which is controlled by said manually operable device and the other of which is controlled by a second device, and means controlled by said relay for controlling said traffic governing devices successively.

16. In combination, a polarized control relay for controlling a railway track switch, a neutral control relay for said switch responsive only to current of greater magnitude than is necessary for operating said polarized control relay, a circuit including said polarized and neutral control relays in series, means for supplying said circuit with current to which said polarized but not said neutral control relay will respond, and means for at times supplying said circuit with current to which said neutral as well as said polarized control relay will respond.

1'7. In combination, a railway switch, a manually controlled selector, a switch controlling relay controlled by said selector and by said switch, a second relay controlled by said selector; a sign-a1 relay controlled by said second relay, said switch, and said switch controlling relay; and a signal controlled by said signal relay.

18. In combination with a railway switch, a first relay, means effective when said first relay is energized to reverse the switch, manually con trolled means for energizing said first relay, means for subsequently holding said first relay closed until the reversal of the switch is completed, a second relay, a third relay, manually controlled means for energizing said third relay, a pickup circuit for said second relay arranged to be closed when said first relay is energized after the reversal of the switch, a stick circuit for said second relay controlled by said third relay and effective when the switch has been reversed, and

signals controlled by the second relay for governing trafiic over said switch.

19. In combination, a group of two-position traffic governing devices, apparatus operable to either of two positions and effective when operated to actuate one such device to a corresponding position, means responsive to a second identical operation of such apparatus after the device has assumed the corresponding position to actuate a different one of the devices in said group, and means responsive to a third identical operation of such apparatus to restore said different one of such devices to its original condition.

20. In combination, a railway switch, a manually controlled contact, a first relay controlled by said contact and by said switch, a motor controlled by said first relay for actuating said switch, a second relay, a third relay controlled by said contact and by said second relay, means controlled by said third relay for at times placing said second relay under the control of said contact, and a signal controlled by said third relay.

21. In combination, a railway switch, a normally open manually controlled contact, a first relay controlled by said contact and by said switch, a second relay, a third relay, a fourth relay, a pick-up circuit for said second relay controlled by said first relay and by said fourth relay, a stick circuit for said second relay controlled by said switch and by said fourth relay, a circuit for said third relay controlled by said second relay, a circuit for said fourth relay controlled by said contact and by said third relay, a motor controlled by said first relay for operating said switch, and a signal controlled by said second relay for governing traffic over said switch.

22. In combination with a railway switch having a normal and a reverse position, two signals for governing traffic over said switch in its two positions respectively, two normally open contacts, manually controlled means for closing a selected one of such contacts for a brief interval of time, means for moving the switch to its normal or reverse position according as one or the other of said contacts is closed, means effective when one of said contacts is closed when the switch occupies a position corresponding to such contact to clear a selected one of said signals, and means effective when a signal has been cleared to restore the signal to stop if either of said contacts is closed.

23. In combination with a railway switch, a pair of manually controlled switch stick relays for governing the position of said switch, a manually. controlled trip relay; a signal stick relay controlled by said switch stick relays, by said switch and by said trip relay; and a signal controlled by said signal stick relay for governing trafiic over said switch.

24. In combination with a railway switch, a pair of switch relays for governing the position of the switch, a manually controlled pick-up circuit for each switch relay, a stick circuit for each switch relay controlled by the other switch relay of the pair and by said switch, a signal relay, two pick-up circuits for said signal relay each controlled by one of said switch relays and by said switch, a manually controlled trip relay, a stick circuit for said signal relay controlled by the trip relay, and a signal controlled by said signal relay for governing traflic over said switch.

25. In combination with a railway switch, a pair of switch relays for governing said switch, manually controlled means for selectively energizing said switch relays, a stick circuit for each switch relay controlled by said switch, a signal relay controlled by said switch relays and by said switch, a trip relay having a contact controlling said signal relay, an auxiliary relay controlled by said signal relay, control circuits for said trip relay controlled by said auxiliary relay and by said manually controlled means, and a signal controlled by said signal relay for governing trafic over said switch.

26. In combination, a railway traific governing device, a control relay for said device, a second relay, a stick relay, manually controllable means for at times momentarily operating said control relay, a pick-up circuit for the stick relay including a front contact of the control relay and a front contact of the second relay, a stick circuit for the stick relay including its own front contact, means including a back contact of said control relay for at times opening said stick circuit to release the stick relay, and means controlled by said stick relay for controlling said governing device.

27. In combination, a railway trafiic governing device, manual control means located at a point remote from the device, a control relay arranged to be energized momentarily in response to an 1') operation of said control means, a stick relay, a

contact, means effective to energize the stick relay in response to a momentary energization of the control relay while said contact is closed, means effective to release the stick relay in response to a momentary energization of the control relay while said contact is open, means for controlling said contact, and means controlled by said stick relay for controlling said governing device.

HERBERT A. WALLACE. 

